Postmenopausal hormone replacement therapy and the primary prevention of cardiovascular disease

Linda L Humphrey1, Benjamin K S Chan, Harold C Sox

  • 1Veterans Affairs Medical Center and Oregon Health & Science University, Portland, Oregon 97201, USA.

Insights

Hormone replacement therapy (HRT) does not appear to prevent cardiovascular disease (CVD) or coronary artery disease (CAD). Further research using randomized controlled trials is needed to confirm the role of HRT in primary CVD prevention.

Area of Science:

  • Cardiovascular Medicine
  • Endocrinology
  • Preventive Medicine

Background:

  • Hormone replacement therapy (HRT) has been investigated for its potential role in preventing cardiovascular disease (CVD).
  • Previous studies have yielded conflicting results regarding the efficacy of HRT in primary prevention of CVD and coronary artery disease (CAD).

Purpose of the Study:

  • To evaluate the effectiveness of hormone replacement therapy (HRT) in the primary prevention of cardiovascular disease (CVD) and coronary artery disease (CAD).

Main Methods:

  • A comprehensive literature search of MEDLINE and Cochrane databases was conducted for primary prevention studies on HRT, CVD, and CAD.
  • Studies were reviewed, abstracted, and quality-rated using U.S. Preventive Services Task Force (USPSTF) criteria.
  • Meta-analysis was performed on good or fair quality studies, with further analysis adjusting for potential confounding factors.

Main Results:

  • The summary relative risk for CVD mortality with HRT was 0.75 (95% CrI, 0.42-1.23) and for CAD mortality was 0.74 (95% CrI, 0.36-1.45).
  • Summary relative risk for CVD incidence was 1.28 (95% CrI, 0.86-2.00) and for CAD incidence was 0.87 (95% CrI, 0.62-1.21).
  • Adjusted analyses indicated no significant benefit of HRT for CAD incidence, suggesting confounding by socioeconomic status, alcohol consumption, and exercise.

Conclusions:

  • This meta-analysis suggests that HRT does not provide a benefit in the primary prevention of CVD or CAD.
  • Findings align with recent randomized trials indicating no protective effect of HRT on CVD events.
  • Randomized, controlled trials are essential to definitively determine the role of HRT in primary CVD prevention.
Abstract

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